03-31-2024, 08:38 AM | #1 |
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The Rear Decklid Vents That Are Facing The Rear Windshield ....?
Are those connected to anything ? As in connected to the HVAC system ?
Or are they just open vents to basically connect the truck to the cabin for some type of airflow ? You can't really see them just by looking at your rear deck lid, but if you put your hand where the rear window meets the rear deck lid, you will feel the vents, that I am assuming just go to the trunk. The reason I am asking is because I have a crazy amount of rattle coming from the desk lid after installing a subwoofer in the truck. I lifted up on the deck lid a bit by using the vent holes as a hand-hold, to which this alleviated much of the rattle. So I'm wondering if I could cram some sound deadening material , or some other foam or something into maybe on of the vent holes to push against the deck lid to stop the rattle. I REALLY don't want to disassemble the entire rear to actually add sound deadening material. |
03-31-2024, 10:15 AM | #2 |
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Not quite sure what vents you are talking about (a photo would help) but they could be there to stop the pressure when shutting the boot lid blowing out the rear parcel shelf.
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03-31-2024, 10:28 AM | #3 | |
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It actually looks to be one large opening that runs about 60% of the length of the very bottom of the rear window / rear deck lid. |
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03-31-2024, 12:23 PM | #4 |
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No idea. On EU cars the rear window is heavily tinted. You can hardly see the heating elements let alone that gap. Only know it there if you reach in from the inside as you said. It’s not accessible from the boot.
Not much help sorry. |
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03-31-2024, 01:37 PM | #5 | |
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There is another thread here from a user with the same problem and he pulled the back seat and rear deck out of the car to fix it. Look it up to see how much success he had with the project. |
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03-31-2024, 01:55 PM | #6 | |
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And even with this subwoofer, I had planned to keep the settings fairly low. However , the rear deck lid rattles so easily that I found myself turning the settings up to drown out the rattle. Believe me , I understand how ridiculous it looks when you pull up next to a car and they are bumping their stereo and everything is vibrating like crazy . That's one of the reasons why at stoplights I lower the volume , lol. I will have to find the thread you mentioned. But I really want to avoid taking apart the entire rear of the car. That's why I'm trying to find out if it is safe to jam a bunch of material into that vent to push up against the deck lid to stop the rattle. |
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03-31-2024, 02:27 PM | #7 |
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This is the thread I was referring to:
https://g87.bimmerpost.com/forums/sh....php?t=2065966 The poster's rattle wasn't caused by a sub, but someone else replying to the thread did mention music/ subs was causing a rattle. That's what I remember reading. |
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03-31-2024, 02:34 PM | #8 | |
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03-31-2024, 05:42 PM | #10 | |
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Do you think there would be any harm into inserting some type of material , just enough to push up and put pressure on the deck lid? |
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03-31-2024, 06:28 PM | #11 | |
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There are 2 large enough holes in the roof of the trunk to get your hands up there and wedge something. You’ll just have to feel around or reference the photo I’ll attach |
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03-31-2024, 06:39 PM | #12 | |
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If I can jam pool noodles under the deck lid, this might really help with my rattle issue. |
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03-31-2024, 06:43 PM | #13 | |
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Apparently that vent rattle has been present on BMWs for many years |
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03-31-2024, 07:58 PM | #14 | |
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But nope, the vent and everything else is kind of just sitting there lol |
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04-02-2024, 07:31 AM | #15 | |
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I've not seen these on my BMWs but with other cars -- see attached pic of my Boxster's rear -- there are rubber flaps located in the sheet metal that is hidden by the rear bumper cover. These rubber flaps are normally closed. But will open from just a bit of air pressure behind them and because they are located in a low pressure air allow air flow from the cabin. The pic is not very good but you can just make out the rubber vent I am talking about It is located inside that rubber duct. I would not block the venting but you could certainly judiciously apply thin strips of felt to eliminate rattle. |
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04-02-2024, 12:38 PM | #16 | |
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The gap is there as I said in post 2 is to allow air to move so you can actually shut the boot and doors without popping something like the parcel shelf or worse, the windows. |
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